The invention discloses a bird feeder which is composed of a round food storage disc, a food placement hole, a storage battery block, a power generator, charging heads, a spoon-shaped wind wheel, a switch button, a fixing rod, a spherical food storage cover and an inserting rod. The bird feeder is characterized in that the round food storage disc is arranged at the upper end of the inserting rod, the fixing rod is arranged in the middle of the round food storage disc, the spherical food storage cover is arranged at the top end of the fixing rod, the storage battery block is arranged on the upper portion of the spherical food storage cover, the switch button is arranged on the storage battery block, two sides of the storage battery block are connected with the charging heads through leads, the power generator is arranged on the upper portion of the storage battery block, and the spoon-shaped wind wheel is arranged on the power generator. When in use, a user inserts the inserting rod into soil for fixing, bird food is placed in the spherical food storage cover from the food placement hole, and the spoon-shaped wind wheel rotates when the wind blows to enable the power generator to work to charge the storage battery block; when the user wants to charge, the user only needs to insert one charging head onto a cellphone and press down the switch button. The bird feeder has the advantages of simple design, low cost and high practicability.